Bookmarks Synchronizer is a Mozilla Firefox extension that let you connect to an FTP server and synchronize your bookmarks that are stored in an XML file. Setup is easy; just write in your FTP server address, username, password and a name for the XML file (by default called xbel.xml). To start, press Upload to create the file on the server and set if you want to automatically download the file on startup or upload it when you close your browser.